I would be interested in having Yeelight being added to the devices identified by Stringify (http://www.stringify.com/) to create chains of actions.

I reached out to them using their customer support and this was their reply:

Looks like Yeelight doesn't have a public oAuth2 (authentication) endpoint, which is something that we require. IFTTT often gets special access to things like this given their size. We'll have to reach out to see if they will give us access.